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All answers having "Flake" as clue:

3 Character Answers:

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NUT



4 Character Answers:

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BAIL

CHIP

DITZ

KOOK

ODDB

PEEL



5 Character Answers:

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SCALE

WACKO



6 Character Answers:

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LAMINA

SCADET

WEIRDO



7 Character Answers:

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ODDBALL



9 Character Answers:

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SCREWBALL



10 Character Answers:

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SPACECADET